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Desiccation does not increase frost resistance of pedunculate oak (Quercus robur L.) seeds / Paweł Chmielarz in Annals of Forest Science, vol 79 n° 1 (2022)
Titre : Desiccation does not increase frost resistance of pedunculate oak (Quercus robur L.) seeds Type de document : Article/Communication Auteurs : Paweł Chmielarz, Auteur ; Jan Suszka, Auteur ; Mikołaj Krzysztof Wawrzyniak, Auteur Année de publication : 2022 Article en page(s) : n° 3 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] croissance des arbres
[Termes IGN] gelée
[Termes IGN] germination
[Termes IGN] Quercus pedunculata
[Termes IGN] semence
[Termes IGN] stockage
[Termes IGN] teneur en eau de la végétation
[Vedettes matières IGN] BotaniqueRésumé : (Auteur) Key message: Decreasing acorns moisture content does not significantly increase the frost resistance of pedunculate oak seeds. Slight reduction in acorn moisture content below the relatively high, optimal level decreased seed survival at temperatures below − 5 °C. The limiting temperature for pedunculate oak’s acorns below which they lose their ability to germinate is about − 10 °C.
Context: Seed moisture content plays an important role in successful seed storage of many species, as desiccation increases frost resistance; however, oak seeds tolerate desiccation only to a very small extent.
Aims: In our study, we examined the impact of decreasing moisture content in acorns of pedunculate oak (Quercus robur L.) on their frost resistance (below − 3 °C) and the growth of seedling derived from frozen seeds.
Methods: Germination and seedling emergence of individual seeds, as well as the dry mass of their 3-month-old seedlings, were measured after acorn desiccation (24–40%, fresh weight basis) and desiccation followed by freezing at temperatures from − 3 °C to − 18 °C for 2 weeks.
Results: Decreasing acorns moisture content did not significantly increase the frost resistance of pedunculate oak seeds. The lowest temperature at which at least half seeds remain viable was − 10 °C. Slight acorns desiccation had only a small positive effect on seeds frozen below − 11 °C (down to − 13 °C), but in this case (acorn moisture content of 33%), low germinability after freezing made storage uneconomic because of the high mortality of seeds. Germinated seeds after desiccation and freezing showed no significant difference in later growth.
Conclusion: Fresh pedunculate oak seed can survive freezing temperature down to − 10 °C and produce good quality seedlings. Temperatures around − 11° to − 13 °C are near lethal to acorns and significantly reduce their viability. Overall, desiccation does not increase their frost resistance; therefore, in practice, it is important to keep acorns during a cold storage in the highly hydrated state.Numéro de notice : A2022-069 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1186/s13595-022-01121-3 Date de publication en ligne : 24/02/2022 En ligne : https://doi.org/10.1186/s13595-022-01121-3 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=100014
in Annals of Forest Science > vol 79 n° 1 (2022) . - n° 3[article]
Titre : An investigation into heat storage by adopting local climate zones and nocturnal-diurnal urban heat island differences in the Tokyo Prefecture Type de document : Article/Communication Auteurs : Christopher O'Malley, Auteur ; Hideki Kikumoto, Auteur Année de publication : 2022 Article en page(s) : n° 103959 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] cartographie thématique
[Termes IGN] climat local
[Termes IGN] distribution spatiale
[Termes IGN] ilot thermique urbain
[Termes IGN] image Landsat-8
[Termes IGN] image Terra-MODIS
[Termes IGN] nuit
[Termes IGN] pente
[Termes IGN] stockage
[Termes IGN] température au sol
[Termes IGN] Tokyo (Japon)
[Termes IGN] variation diurneRésumé : (auteur) This study aims to identify urban forms that are prone to heat storage in the Tokyo Prefecture in Japan. First, local climate zones (LCZ) were identified with 100 m pixel resolution using Landsat 8 data. LCZs include urban forms that are predominantly defined by building compactness and height. The spatial distribution of urban heat island intensity was obtained using LCZs and MODIS 100 m resolution land surface temperatures from 2013 to 2021. The difference between diurnal and nocturnal heat island intensity (∆UHI) was evaluated as an indicator of the relative heat storage effect between the LCZs. Lower ∆UHIs suggest increased relative heat-storage capacities. Seasonal average ∆UHIs for compact and super high-rise, high-rise, mid-rise, and low-rise LCZs were 3.1 °C, 4.1 °C, 5.8 °C, and 8.3 °C, respectively. Additionally, ∆UHIs for open and super high-rise, high-rise, and mid-rise LCZs were 5.8 °C, 6.4 °C, and 7.8 °C, respectively. Slope data also validated the LCZ height. LCZ and slope analyzes found lower ∆UHI magnitudes in all LCZs with high-rise buildings. Also, compact LCZs had lower ∆UHI magnitudes than open LCZs at corresponding heights. Therefore, higher-rise and compact LCZs are suggested to have larger relative heat storage effects than lower-rise and open LCZs. Numéro de notice : A2022-486 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1016/j.scs.2022.103959 Date de publication en ligne : 19/05/2022 En ligne : https://doi.org/10.1016/j.scs.2022.103959 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=100951
in Sustainable Cities and Society > vol 83 (August 2022) . - n° 103959[article]
Titre : A GIS-based approach for identification of optimum runoff harvesting sites and storage estimation: a study from Subarnarekha-Kangsabati Interfluve, India Type de document : Article/Communication Auteurs : Manas Karmakar, Auteur ; Debasis Ghosh, Auteur Année de publication : 2022 Article en page(s) : pp 253 - 266 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] analyse multicritère
[Termes IGN] ArcGIS
[Termes IGN] barrage
[Termes IGN] couche thématique
[Termes IGN] eau de surface
[Termes IGN] eau pluviale
[Termes IGN] géomorphologie locale
[Termes IGN] gestion de l'eau
[Termes IGN] Inde
[Termes IGN] MNS SRTM
[Termes IGN] plan d'eau
[Termes IGN] ruissellement
[Termes IGN] stockageRésumé : (auteur) Numéro de notice : A2022-491 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s12518-022-00433-3 Date de publication en ligne : 29/03/2022 En ligne : https://doi.org/10.1007/s12518-022-00433-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=100789
in Applied geomatics > vol 14 n° 2 (June 2022) . - pp 253 - 266[article]
Titre : Simulation d'ouragans et de collectes de déchets sur QGIS pour l'amélioration de la collecte des déchets post-ouragan Type de document : Article/Communication Auteurs : Quy Thy Truong Année de publication : 2022 Conférence : ICC 2021, 30th ICA international cartographic conference 14/12/2021 18/12/2021 Florence Italie Article en page(s) : pp 61 - 63 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] catastrophe naturelle
[Termes IGN] collecte des déchets
[Termes IGN] dommage matériel
[Termes IGN] gestion de crise
[Termes IGN] implémentation (informatique)
[Termes IGN] module d'extension
[Termes IGN] prototype
[Termes IGN] QGIS
[Termes IGN] Saint-Martin, île de
[Termes IGN] simulation spatiale
[Termes IGN] stockage
[Termes IGN] tempêteRésumé : (Auteur) [Contexte] Au cours des dernières décennies, des évènements naturels catastrophiques tels que des tempêtes et des ouragans ont touché des millions de personnes dans le Monde : environ 33 millions de personnes sont touchées chaque année entre 2007 et 2016 (Bellow et Wallemacq, 2018). Par exemple, l'ouragan Katrina (Etas-Unis, 2015) a causé des dégâts catastrophiques du centre de la Floride à l'est du Texas, au moins 1836 personnes sont mortes et le total des dommages matériels a été estimé à 125 milliards de dollars. Par ailleurs, le changement climatique est susceptible d'augmenter la fréquence des catégories d'ouragans les plus intenses ainsi que le niveau de la mer, entraînant des ondes de tempête plus destructrices lorsque des ouragans se produisent (GIEC, 2013). Les ouragans génèrent de grandes quantités de déchets directement liés aux impacts induits (Brown et al., 2011). La rapidité de collecte et de tri des déchets est essentielle car non seulement les déchets bloquent et ralentissent l'activité humaine mais ils génèrent aussi des pollutions. La gestion de ces déchets est donc un enjeu majeur dans la gestion de crise post-ouragan. L'ouragan Irma, qui a frappé les Caraïbes au début de septembre 2017, en particulier les îles de Saint-Martin et Saint-Barthélémy, est un exemple frappant de ce problème. Dans cet article nous présentons un système d'information pour améliorer la collecte des déchets post-ouragan aux Antilles françaises. Ces travaux sont faits dans le cadre du projet de recherche DéPOs financé par l'ANR. Numéro de notice : A2022-676 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101891
in Cartes & Géomatique > n° 247-248 (mars-juin 2022) . - pp 61 - 63[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 021-2022011 SL Revue Centre de documentation Revues en salle Disponible
Titre : Factors affecting winter damage and recovery of newly planted Norway spruce seedlings in boreal forests Type de document : Article/Communication Auteurs : Jaana Luoranen, Auteur ; Johanna Riikonen, Auteur ; Timo Saksa, Auteur Année de publication : 2022 Article en page(s) : n° 119759 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] coupe rase (sylviculture)
[Termes IGN] dommage forestier causé par facteurs naturels
[Termes IGN] Finlande
[Termes IGN] forêt boréale
[Termes IGN] hiver
[Termes IGN] phénomène météorologique
[Termes IGN] Picea abies
[Termes IGN] régénération (sylviculture)
[Termes IGN] semis (sylviculture)
[Termes IGN] stockage
[Vedettes matières IGN] Végétation et changement climatiqueRésumé : (auteur) In boreal and temperate forest zones, snowless winters and springs with varying temperature conditions are becoming more common with climate change. In the spring of 2020, extensive winter damage in Norway spruce (Picea abies (L.) Karst.) seedlings, which had been planted the previous year in Central Finland, was observed. In most cases, the probable reason was winter desiccation. This provided a good opportunity to study the regeneration site, seedling, and weather factors that affect winter damage and the recovery of seedlings from damage. In the study, systematic plot sampling was done in 60 selected regeneration sites where damage was known to have occurred. The prediction models for the probabilities of winter damage and the recovery of seedlings were fit to the data. The risk of winter damage was higher in seedlings packed in a closed package than in seedlings stored in open trays. The risk was especially high if seedlings packed in a closed package were stored for more than a week before planting in the middle of June or later. In open trays, the risk of damage was highest in seedlings planted in September, but even then, the risk was lower than in seedlings packed in a closed package. Long storage duration also increased the damage risk in seedlings stored in open trays and planted in September. Other factors that increased damage were coarse soil and the sample plot being on top of a hill. Factors reducing the risk were a fast chain from clear-cutting to planting, planting in good-quality mounds, a sample plot position on the north slope, and the shading of the forest edge on the southern side of a plot. Recovery of seedlings was weaker when seedlings were stored in a closed package and planted in the fall, in too shallow planting depth, or in humus-covered mounds. Recovery improved when seedlings were planted at a depth of at least 5 cm, or when the coniferous forest edge was on the southern or western side of a plot. Winter damage reduced seedling growth and induced the formation of multiple leaders. In practice, the most important factors to be taken into account were avoiding long storage duration and planting seedlings packed in a closed package after the middle of June. Good-quality site preparation and planting were also important for minimizing the risk of damage and improving recovery. Numéro de notice : A2022-011 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1016/j.foreco.2021.119759 Date de publication en ligne : 07/10/2021 En ligne : https://doi.org/10.1016/j.foreco.2021.119759 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99068
in Forest ecology and management > vol 503 (January-1 2022) . - n° 119759[article]n° 1 - août 2003 - [en ligne] Dossier : Stockage du bois de hêtre (Bulletin de Rendez-vous techniques)
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